Technology role with a custom ActorReference not properly loaded

[tls-fledoux]

There is an issue with actor references when a virtual model instance is loaded.

Firstly, the environment is Windows, OpenJDK 1.8 and OpenFlexo 2.0.1 latest commit at the moment (80cebcf).

To reproduce the issue, initial conditions are :

• A project using a technology
• A serialized FML-RT instance within this project which contains a technology role with a custom ActorReference.

Steps:

• Open the project containing the FML-RT instance
• Open the FML-RT instance
• An error occurred

Findings:

I confirmed the issue with the Excel technology and custom ones.
During the FML deserialization in the ActorReference implementation, the method "getModelSlotInstance()" returns null and thus, the role thereby the FML RT instance cannot be properly loaded.

An example project with the issue is available as attachment (Excel technology).
TestExcel.prj.zip